Analysis of the retinal edema of full-thickness macular holes by scanning laser ophthalmoscopy and optical coherence tomography

The purpose of this study was to investigate the relationship between the dark area illuminated by scanning laser ophthalmoscopy (SLO) and cystic spaces around macular holes as shown by optical coherence tomography (OCT). SLO allows for two dimensional retinal examination, using short wave length (514 nm, argon) which is useful for the vitreoretinal surface and inner retina; red helium-neon laser (633 nm), which is capable of imaging deeper tissues; and infrared diode laser (780 nm), for choroidal examination. OCT is analogous to ultrasound except that optical rather than acoustic reflectivity is measured. OCT can produce the cross-sectional view of retina. Using SLO (helium-neon laser) and OCT, we examined 8 eyes with full-thickness macular holes. Eight normal eyes served as controls. Cystic spaces were in proportion to dark areas with statistical significance as shown by correlation analysis. Evaluation of the full-thickness macular holes by using both SLO and OCT is highly useful.